Jban is a Joomla plugin with versions for Joomla 2.5.x and Joomla 1.5.x. This is used to define the IP addresses who are eligible to
connect to the administrator back end of a Joomla based website. The IP address here is the
IP address that is used to open the website administrator back end.
This plugin is important in terms of blocking any illegal access to your site backend. It saves your site from hackers and other spammers.